Watch-regulator



(No Modem E. 'KLAHN WATCH REGULATOR.

No. 470,298. Patented Mar. 8, 1.892.

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EMIL KLAI'IN, OF JERSEY CITY, NEV JERSEY, ASSIGNOR TO TI-IE WATER- BURYWATCH COMPANY, OF IYATERBURY, CONNECTICUT.

WATCH- REG U LATO R.

SPECIFICATION forming part of Letters Patent No. 470,298, dated March 8,1892.

Application iiled May 4,1891. Serial No. 391,533. (No model.)

To all whom it may concern.-

Be it known that I, EMIL KLAHN, a citizen of the United States, and aresident of Jersey City, in the county of Hudson and State of NewJersey, have invented certain new and useful Improvements in Regulatorsfor Vatches, of which the following is a specification.

My invention relates to improvements in regulators for watches; and theobject of my invention is to obtain a regulator the arm of which can bealways placed in the middle of the balance-bridge after the movement hasbeen regulated by shifting the regulator-arm to the right or left handside of the bridge. I attain this object by the mechanism illustrated inthe accompanying drawings, in which- Figure 1 is a plan view of abalance-bridge with my improved regulator, and Fig 2 is a side view ofthe same partly in section.

Similar letters of reference indicate corresponding parts.

A in the drawings, represents the balancebridge, which has a disk-shapedupwardlyprojecting portion a and a lateral lug a, to which the outer endof the hair-spring B is fastened.

C is the ring-shaped regulator, the inner circumference of which isconically-shaped, so as to lit into a corresponding` groove in the outercircumference of the disk-shaped projection a of the bridge, as shown inFig. 2.

The ring-shaped regulator is spring-acting and presses against thedisk-shaped portion d. ofthe bridge. A part of the hair-spring passesthrough an eye on the rear side of a radial arm c of the regulator-ringC, as in an ordinary watch-movement employing a hairspring and alever-regulator. Through the portion o of the bridge, out of the centerof the same, a circular hole is bored, a part of the circumference ofwhich projects over the outer circumference of the disk-shaped portiona', as shown in Fig. .1. In this hole a downwardly-projecting pin d onone end of the regulator-arm D is inserted, which may be secured to theunder side of the bridge in any reliable manner, so as to be preventedfrom being removed from the bridge. The pin d is provided with a grooveof the same shape of that of the disk-shaped portion a', so as tolikewise correspond with the conical inner circumference of theregulator-ring. Of course the latter may have another shape; but thegrooves of the disk-shaped portion of the bridge and of the pin have tocorrespond with the shape of the inner circumference of theregulator-ring. Then it is desired to increase or decrease the speed ofthe move- 6o ment the free end of the lever D is shifted to the right orleft hand side. The downwardly-eXtending pin d on the other end of thelever corresponds with the inner circumference of the regulator-ringandturns the same simultaneously in the same direction, so that thehair-spring, passing through the eye in the rear side of the radial armc of the regulater-ring, is lengthened orshortened. When the speed ofthe movement has thus been 7o regulated, the radial arm c is taken holdof by pinchers and the free end of the lever shifted back until it isplaced in the middle of the bridge. This is done without moving` theregulator-ring, as the same and the pin of the lever communicate only byfriction, which is interrupted by stopping the radial arm d.

By the mechanism described the regulatorlever can be easily placed inthe middle of So the bridge and the indicator-scale of the same, so thatthe so-called timing of the spring is greatlyv facilitated, which isnecessary before a watch is placed on sale.

Having thus described my invent-ion, I claim as new and desire to secureby Letters Patent- In a regulator for watches, the combination of theregulator-arm having on one end a downwardlyextending pin, which is pro-9c vided with a groove and passes through a disk-shapedupwardly-extendiug portion oi' the bridge out of the center of the same,with the regulator-ring pressing against the said disk-shaped portion ofthe bridge, and having its inner circumference of such a shape as tocorrespond with the groove of the pin and to engage with the same byfriction, substantially as set forth.

Signed at New York, in the county of New roo York and State of New York,this 21st day of April, A. D. 1891.

EMIL KLAHN.

Witnesses:

CHARLEs Kani), Louis B. HAsBnoUcK.

